Resumo

VALARELLI, Fabrício Pinelli et al. Effectiveness of mini-implants on the maxillary molars intrusion. Innov. Implant. J., Biomater. Esthet. (Online) [online]. 2010, vol.5, n.1, pp. 66-71. ISSN 1984-5960.

Among adult patients, the extrusion of posterior teeth due to loss of antagonist is frequent, with reducing of the interocclusal space needed for prosthetic rehabilitation. In these cases, the mini-implants use as skeletal anchorage for intrusion of molars has been very common, due to its benefits variety for both the patient and the orthodontists. This report presents a case of a 42-years woman with the extrusion of the right maxillary first molar into the interocclusal space of the mandibular first molar. The orthodontic treatment included the installation of three mini-implants in the alveolar bone, in order to obtain the molar intrusion. The mini-implants were inserted between the roots of the maxillary teeth, with two mini-implants in the buccal side (mesial and distal of the first molar) and the other mini-implant in the palatal side (between the second premolar and first molar). An intrusive force averaged 150-200 g was applied, and after 4 months, an intrusion of 3 mm of maxillary right first molar was obtained. The use of mini-implants was effective at molar intrusion, making it a valuable resource to correct the extrusion of posterior teeth, due to tooth loss in the antagonist arch, and also recover the interocclusal space needed for prosthetic rehabilitation of the patient, without causing reciprocal extrusion movements.

Palavras-chave : Tooth movement; Orthodontic anchorage procedures; Molar.